The following table shows which version of .NET is preinstalled on Windows and which QLM DLL to use in each case.

.NET Version

Windows Version

Works with

.NET 2.0

.NET 3.0

.NET 3.5

Windows 2003

Windows 2008+

Windows Vista

Windows 7

QLM .NET 2.0 DLLs

.NET 4.0

.NET 4.5

.NET 4.6

Windows 8

Windows 8.1

Windows 2012

Windows 10

Windows 2016

QLM .NET 4.0 DLLs

For example, if you install your application on a Windows 8.1 operating system, it is preferred to use the QLM .NET 4.0 DLLs. However, you can still use the .NET 2.0 DLLs on Windows 8.1 if you install .NET 2.0 (or 3.0 or 3.5) on the customers system.